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Abstract

The phase instability induced during the transfer of radio frequency and optical clock signals through the turbulent atmosphere was measured in a rooftop experiment. Radio frequency intensity modulation of a laser to transmit signals over 100m results in an Allan deviation of 1.31×10−10 at 1s. Optical transfer is more accurate at 1.68×10−13 at 1s. As a consequence, fiber links are more suitable for the transfer of optical frequencies over very long distances while free space transmission might find applications in short distances of less than 1km.

References

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